Building a clean, playable archive is better than downloading random files from untrusted sites. Here’s the safe, ethical approach.

| Problem | Likely Cause | Solution | |---------|--------------|----------| | PSP freezes during loading | Too high compression (level 9) + large block size | Recompress with level 4–5, 16KB block | | Emulator says "corrupted data" | File extension is .iso.cso or wrong | Rename to gamename.cso | | CSO larger than original ISO | Used level 0 compression | Recompress with level ≥ 1 | | Game video stutters | Aggressive compression on video-heavy data | Use ISO for that game, or increase block size to 32KB | | Can't convert back to ISO | Tool doesn't support CSO v2 (rare) | Use MaxCSO or ciso v2+ |